I will be short.
Yes it is worth because where is no alternative to l2 classic server, which has population.
Yes, early game is dead. Since server is old everyone is 76 lvl + and has 54745 alts alrready.
BUT that doesnt mean you wont find people to kill Raid Bosses. You will, don't worry.
At high lvl u will see plebs with +0 weapons as well, dont worry, not all people have +16 weapons or +10. Only top guilds and top people who spend centuries on the server and are old enough to be my grandpa.
p.s. it is not that hard to get +10 weapon ttbh. expect SOES ( mage staff, kinda rare, expensive) others are ok.
Most fun is on EU prime? Because you have 2 clans fighting. Chinese has monopoly on their prime time, and NA side, idk, they come and they go, come and go. Depends.
talking about epics. Well, where is not many people have 3 lvl epics, because they are still rare, expect AQ ring LOL.
and I wont bother getting them anyway. you can have fun without them.
and most people u will /target wont even have BO + 5, only heroes have (epicS) them/clan leaders/really rich bois which are not many.
Have fun !